BIOL 150B Lecture Notes - Lecture 13: Quantitative Trait Locus, Pleiotropy, Zygosity
19 Feb 2018
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To determine the genotype of an individual you perform a testcross. The probability scale ranges from 0 to 1. If you want to determine the probability of two independent events at once. The rules of probability are similar to that of a coin flip. Incomplete dominance is when every single zygote comes out as a mixture of both parental zygotes. A red and white flower, produce a pink flower. Most genes have 2 versions (alleles) an example of that is human blood cells (where there are three different possible alleles, a, b and o) Neither allele masks the presence of the other. People with o blood type have a very difficult time receiving blood, but is most commonly used as a donor towards a, b. Pleiotropy is when one gene may influence multiple characters. A single character may be influenced by many genes. Phenotypic variation in population is along a continuum.
